Galaxies Flashcards
(5 cards)
1
Q
Types of galaxies
A
Elliptical
Spiral
Barred spiral
Irregular
2
Q
Spiral galaxy properties
A
Central bulge -old stars (mini elliptical Galaxy)
Rotating disk - thin=young stars , thick=old stars
Range of star types
2-4 arms containing massive stars
3
Q
Barred spiral properties
A
Central bar with 2 arms
Common in more massive and older spiral galaxies
4
Q
Irregular Galaxy properties
A
Diverse
Young and old stars
Star formation occurs
5
Q
Galaxy collisions
A
Dependent of mass ratio of galaxies
Potential accelerates stars
Gas settles into disk, clouds collide and stars form
Some gas feeds central black hole
